Yellow Sapphire stands nine over the hardness scale holding the third position soon after Diamond and Moissanite. In case the gemstone is more than one carat then it can't have clean edges. Sri Lanka has captivated the Yellow Sapphires for hundreds of years. Artisans craft this gemstone’s jewellery in cameos https://www.apsense.com/article/810029-some-historical-facts-about-sri-lankan-yellow-sapp.html